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Oscillator

Discussion in 'General Electronics Discussion' started by electronic123, Oct 26, 2017.

  1. electronic123

    electronic123

    3
    0
    Oct 21, 2017
    Hi

    I'm learning about oscillator and looking for a really simple circuit to see how it works

    i would appreciate if someone send a super simple circuit

    thank you
     
  2. kellys_eye

    kellys_eye

    4,286
    1,143
    Jun 25, 2010
    What kind of oscillator?

    Audio, RF, sine, square???? There are many different types and each used for specific purposes. Your request is too vague to answer with certainty.
     
  3. Alec_t

    Alec_t

    2,546
    672
    Jul 7, 2015
    Here you go :
    SimpleOsc.PNG
     
    Arouse1973 and kellys_eye like this.
  4. kellys_eye

    kellys_eye

    4,286
    1,143
    Jun 25, 2010
    Apparently not!

    LOL
     
  5. dorke

    dorke

    2,344
    663
    Jun 20, 2015
    Here is an even simpler one.
    Simpler to explain and understand.
    Any number of odd gates can be used, you can use 1,3,5 from an hex schmidt-trigger and notice the effect on the oscillation period.

    Obviously, You should use an oscilloscope to test it.

    Noname.jpg
     
    Alec_t likes this.
  6. FuZZ1L0G1C

    FuZZ1L0G1C

    280
    93
    Mar 25, 2014
    2Transist_osc_2npn.png
    aka Multivibrator.
    Very simple operation -
    One base switches its transistor on first, due to tolerance imbalances between components. (eg Q1).
    That capacitor, C1 discharges through Q1 c-e junction, completing ground-path for C1.
    Due to discharge, other plate of C1, connected to Q2b, gets pulled negative, switching Q2 off.
    This allows C2 to charge up as no path to ground.
    Meanwhile, already discharged C1 no longer negative so R2 feeds a positive bias to Q2 base until Q2 conducts, discharging C2 and switching Q1b off. So the cycle continues....
    Note: Waveform on collectors is not true square due to charging capacitors.
    The RC values set the time constant for each half, so adjustment of mark-space ratio is possible.
    For a truer square wave, emitter-base couple a third transistor to the multivibrator.
    Q3b must go to Q1e or Q2e. Then load on Q3c.
     
  7. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,962
    648
    May 8, 2012
    One of my first oscillators. :)
    Chris
    upload_2017-11-1_19-26-48.png
     
  8. AnalogKid

    AnalogKid

    2,234
    629
    Jun 10, 2015
    [​IMG]

    ak
     
  9. dorke

    dorke

    2,344
    663
    Jun 20, 2015
    Single relay, electoro-mechanical Oscillator.


    untitled.JPG
     
  10. CDRIVE

    CDRIVE Hauling 10' pipe on a Trek Shift3

    4,962
    648
    May 8, 2012
    Dork, you beat me to it. I added a flyback diode and cap to clean up the output. Though excluding them makes an effective alarm clock event. Ya just need to add two wires taped to your body. :D

    Chris
    upload_2017-11-2_9-25-37.png
     
    Arouse1973 likes this.
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